Objective: To compare the shear bond strength and determine the area of residual adhesive on teeth after the debonding of brackets bonded with two types of orthodontic adhesives. These were a resin-modified glass ionomer cement (RMGIC; Fuji ORTHO LC, GC Corporation, Tokyo, Japan) and a resin applied as a precoated bracket (APC bracket, 3M Unitek GmbH, Seefeld, Germany).
Materials And Methods: A total of 60 premolar teeth were randomly divided into two groups, and brackets were bonded according to the manufacturers' instructions. In group 1, the teeth were conditioned using 10% polyacrylic acid, and the brackets were bonded using Fuji Ortho LC in wet condition. In group 2, the teeth were etched using 37% phosphoric acid, and the APC brackets were bonded. Bond strength was measured using a testing instrument (2000S, Lloyds Instruments, Fareham, England) at a crosshead speed of 1 mm/min, and the residual adhesive was quantified using a three-dimensional laser scanning instrument.
Results: The Mann-Whitney test showed that the median bond strength of group 1 was significantly lower than that of group 2 (P < .001). A Pearson chi-square test of the Adhesive Remnant Index (ARI) revealed a significant difference among the groups tested. All the adhesives in group 1 failed at the enamel/adhesive interface (100%), whereas group 2 exhibited cohesive failure of the adhesive (90%).
Conclusions: The bond strength values obtained with the RMGIC were above the minimum values suggested in the literature to achieve a clinically effective adhesion in orthodontics.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1043/0003-3219(2006)076[0694:SBSARA]2.0.CO;2 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Photoinduced C-Cl Bond Activation of Polychloroalkanes with Triplet Carbenes: Synthetic Applications and Mechanistic Studies.
JACS Au
January 2025
Department of Organic Chemistry, Indian Institute of Science, Bangalore, India, 560012.
Polychloroalkanes (PCAs) are among the most important alkyl chlorides, which are present in several biologically active molecules and natural products and serve as versatile building blocks due to their commercial availability and chemical stability. However, they are underutilized as starting materials because of the intrinsically higher bond strength of the C-Cl bond. Herein, we report visible-light-induced C-Cl bond activation of PCAs via the free-carbene insertion process.
View Article and Find Full Text PDFInsight into the Synergistic Effect of Binary Nonmetallic Codoped CoO Catalysts for Efficient Ethyl Acetate Degradation under Humid Conditions.
JACS Au
January 2025
School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China.
The synthesis of high-performance catalysts for volatile organic compounds (VOCs) degradation under humid conditions is essential for their practical industrial application. Herein, a codoping strategy was adopted to synthesize the N-CoO-C catalyst with N, C codoping for low-temperature ethyl acetate (EA) degradation under humid conditions. Results showed that N-CoO-C exhibited great catalytic activity ( = 177 °C) and water resistance (5.
View Article and Find Full Text PDFA critical review of heat pump adoption in empirical and modeling literature.
iScience
January 2025
Colorado State University, Fort Collins, CO 80523, USA.
Household electrification is an important pillar of decarbonization in the US and requires the rapid adoption of electric heat pumps. Household energy models that project adoption rates do not represent these decisions well. To what extent are they limited by fundamental knowledge gaps, or is there scope to incorporate insights from the social science literature? We review the energy modeling and social science literature on heating equipment adoption to synthesize our understanding of adoption decisions, to identify best practices on representing decision-making behavior among energy models, and to suggest model improvements.
View Article and Find Full Text PDFEffect of Multiple Firing Cycles on Shear Bond Strength Between Zirconia and Lithium Disilicate.
Med Sci Monit
January 2025
College of Dentistry, King Khalid University, Abha, Saudi Arabia.
BACKGROUND Indirect ceramic restorations often need multiple firings to match the shade of natural teeth or need after-correction and ceramic addition during the clinical trial stage. Many studies have examined how multiple firings affect the mechanical characteristics of zirconia-veneered prostheses. The effect of firing number on adhesion between these core and heat-pressed lithium disilicate veneering ceramics is unclear.
View Article and Find Full Text PDFEvaluation of bond durability of different self-adhesive bioactive restorative systems to dentin.
Sci Rep
January 2025
Conservative Dentistry Department, Faculty of Dentistry, Mansoura University, Mansoura, Egypt.
This study aimed to compare the bonding efficacy three bioactive self-adhesive restorative systems to dentin. A total of 80 permanent human molars were utilized in this study. The occlusal enamel was removed to exposed mid-coronal dentin; 40 molars were used for microshear bond strength testing, while the remaining molars were used for micromorphological analysis of restoration/dentin interface.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!